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Finding the Fourth Proportional to 491,615.38, 678,493.90 and 276,797.32

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Solution

The fourth proportional to 491,615.38, 678,493.90 and 276,797.32 is: 382,016.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,615.38 : 678,493.90 = 276,797.32 : x
  2. Step 2: Convert to fraction form
    491,615.38/678,493.90 = 276,797.32/x
  3. Step 3: Cross multiply
    491,615.38x = 678,493.90 × 276,797.32
  4. Step 4: Simplify right side
    491,615.38x = 187,805,293,156.35
  5. Step 5: Solve for x
    x = 187,805,293,156.35/491,615.38
  6. Step 6: Final answer
    x = 382,016.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.